“The drama of the work is unleashed only by the viewer’s interaction with it. When, at the official unveiling last week, I spotted two small children gleefully trundling a boulder into the middle of the artificial stream I felt a lurch of horror – and not just because the children happened to be my own. So ingrained is our expectation of the imperative to look but not touch when encountering an artwork, that there is something disorienting about a piece that so openly invites intervention. Indeed, Riverbed demands it; every visitor who walks across the unstable surface of this artificial landscape necessarily effects a transformation in it, causes damage of some kind.” —The Telegraph